/*
 * JBoss, Home of Professional Open Source
 * Copyright 2011, Red Hat, Inc. and individual contributors
 * by the @authors tag. See the copyright.txt in the distribution for a
 * full listing of individual contributors.
 *
 * This is free software; you can redistribute it and/or modify it
 * under the terms of the GNU Lesser General Public License as
 * published by the Free Software Foundation; either version 2.1 of
 * the License, or (at your option) any later version.
 *
 * This software is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this software; if not, write to the Free
 * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
 * 02110-1301 USA, or see the FSF site: http://www.fsf.org.
 */

package org.mobicents.protocols.ss7.cap.service.circuitSwitchedCall.primitive;

import java.io.IOException;

import org.mobicents.protocols.asn.AsnException;
import org.mobicents.protocols.asn.AsnInputStream;
import org.mobicents.protocols.asn.AsnOutputStream;
import org.mobicents.protocols.asn.Tag;
import org.mobicents.protocols.ss7.cap.api.CAPException;
import org.mobicents.protocols.ss7.cap.api.CAPParsingComponentException;
import org.mobicents.protocols.ss7.cap.api.CAPParsingComponentExceptionReason;
import org.mobicents.protocols.ss7.cap.api.isup.Digits;
import org.mobicents.protocols.ss7.cap.api.service.circuitSwitchedCall.primitive.VariablePart;
import org.mobicents.protocols.ss7.cap.api.service.circuitSwitchedCall.primitive.VariablePartDate;
import org.mobicents.protocols.ss7.cap.api.service.circuitSwitchedCall.primitive.VariablePartPrice;
import org.mobicents.protocols.ss7.cap.api.service.circuitSwitchedCall.primitive.VariablePartTime;
import org.mobicents.protocols.ss7.cap.isup.DigitsImpl;
import org.mobicents.protocols.ss7.cap.primitives.CAPAsnPrimitive;

/**
 * 
 * @author sergey vetyutnev
 * 
 */
public class VariablePartImpl implements VariablePart, CAPAsnPrimitive {

	public static final int _ID_integer = 0;
	public static final int _ID_number = 1;
	public static final int _ID_time = 2;
	public static final int _ID_date = 3;
	public static final int _ID_price = 4;

	public static final String _PrimitiveName = "VariablePart";

	private Integer integer;
	private Digits number;
	private VariablePartTime time;
	private VariablePartDate date;
	private VariablePartPrice price;

	public VariablePartImpl() {
	}

	public VariablePartImpl(Integer integer) {
		this.integer = integer;
	}

	public VariablePartImpl(Digits number) {
		this.number = number;
	}

	public VariablePartImpl(VariablePartTime time) {
		this.time = time;
	}

	public VariablePartImpl(VariablePartDate date) {
		this.date = date;
	}

	public VariablePartImpl(VariablePartPrice price) {
		this.price = price;
	}

	@Override
	public Integer getInteger() {
		return integer;
	}

	@Override
	public Digits getNumber() {
		return number;
	}

	@Override
	public VariablePartTime getTime() {
		return time;
	}

	@Override
	public VariablePartDate getDate() {
		return date;
	}

	@Override
	public VariablePartPrice getPrice() {
		return price;
	}

	@Override
	public int getTag() throws CAPException {

		if (this.integer != null) {
			return _ID_integer;
		} else if (this.number != null) {
			return _ID_number;
		} else if (this.time != null) {
			return _ID_time;
		} else if (this.date != null) {
			return _ID_date;
		} else if (this.price != null) {
			return _ID_price;
		} else {
			throw new CAPException("Error while encoding " + _PrimitiveName + ": no of choices has been definite");
		}
	}

	@Override
	public int getTagClass() {
		return Tag.CLASS_CONTEXT_SPECIFIC;
	}

	@Override
	public boolean getIsPrimitive() {
		return true;
	}

	@Override
	public void decodeAll(AsnInputStream ansIS) throws CAPParsingComponentException {

		try {
			int length = ansIS.readLength();
			this._decode(ansIS, length);
		} catch (IOException e) {
			throw new CAPParsingComponentException("IOException when decoding " + _PrimitiveName + ": " + e.getMessage(), e,
					CAPParsingComponentExceptionReason.MistypedParameter);
		} catch (AsnException e) {
			throw new CAPParsingComponentException("AsnException when decoding " + _PrimitiveName + ": " + e.getMessage(), e,
					CAPParsingComponentExceptionReason.MistypedParameter);
		}
	}

	@Override
	public void decodeData(AsnInputStream ansIS, int length) throws CAPParsingComponentException {

		try {
			this._decode(ansIS, length);
		} catch (IOException e) {
			throw new CAPParsingComponentException("IOException when decoding " + _PrimitiveName + ": " + e.getMessage(), e,
					CAPParsingComponentExceptionReason.MistypedParameter);
		} catch (AsnException e) {
			throw new CAPParsingComponentException("AsnException when decoding " + _PrimitiveName + ": " + e.getMessage(), e,
					CAPParsingComponentExceptionReason.MistypedParameter);
		}
	}

	private void _decode(AsnInputStream ais, int length) throws CAPParsingComponentException, IOException, AsnException {

		this.integer = null;
		this.number = null;
		this.time = null;
		this.date = null;
		this.price = null;

		if (ais.getTagClass() != Tag.CLASS_CONTEXT_SPECIFIC || !ais.isTagPrimitive())
			throw new CAPParsingComponentException("Error while decoding " + _PrimitiveName + ": bad tagClass or is not primitive",
					CAPParsingComponentExceptionReason.MistypedParameter);

		switch (ais.getTag()) {
		case _ID_integer:
			this.integer = (int) ais.readIntegerData(length);
			break;
		case _ID_number:
			this.number = new DigitsImpl();
			((DigitsImpl) this.number).decodeData(ais, length);
			break;
		case _ID_time:
			this.time = new VariablePartTimeImpl();
			((VariablePartTimeImpl) this.time).decodeData(ais, length);
			break;
		case _ID_date:
			this.date = new VariablePartDateImpl();
			((VariablePartDateImpl) this.date).decodeData(ais, length);
			break;
		case _ID_price:
			this.price = new VariablePartPriceImpl();
			((VariablePartPriceImpl) this.price).decodeData(ais, length);
			break;
		default:
			throw new CAPParsingComponentException("Error while decoding " + _PrimitiveName + ": bad tag: " + ais.getTag(),
					CAPParsingComponentExceptionReason.MistypedParameter);
		}
	}

	@Override
	public void encodeAll(AsnOutputStream asnOs) throws CAPException {
		this.encodeAll(asnOs, this.getTagClass(), this.getTag());
	}

	@Override
	public void encodeAll(AsnOutputStream asnOs, int tagClass, int tag) throws CAPException {

		try {
			asnOs.writeTag(tagClass, this.getIsPrimitive(), tag);
			int pos = asnOs.StartContentDefiniteLength();
			this.encodeData(asnOs);
			asnOs.FinalizeContent(pos);
		} catch (AsnException e) {
			throw new CAPException("AsnException when encoding " + _PrimitiveName + ": " + e.getMessage(), e);
		}
	}

	@Override
	public void encodeData(AsnOutputStream asnOs) throws CAPException {

		int choiceCnt = 0;
		if (this.integer != null)
			choiceCnt++;
		if (this.number != null)
			choiceCnt++;
		if (this.time != null)
			choiceCnt++;
		if (this.date != null)
			choiceCnt++;
		if (this.price != null)
			choiceCnt++;
		
		if (choiceCnt != 1)
			throw new CAPException("Error while encoding " + _PrimitiveName + ": only one choice must be definite, found: " + choiceCnt);

		try {
			if (this.integer != null)
				asnOs.writeIntegerData(this.integer);
			if (this.number != null)
				((DigitsImpl) this.number).encodeData(asnOs);
			if (this.time != null)
				((VariablePartTimeImpl) this.time).encodeData(asnOs);
			if (this.date != null)
				((VariablePartDateImpl) this.date).encodeData(asnOs);
			if (this.price != null)
				((VariablePartPriceImpl) this.price).encodeData(asnOs);
		} catch (IOException e) {
			throw new CAPException("IOException when encoding " + _PrimitiveName + ": " + e.getMessage(), e);
		}
	}

	@Override
	public String toString() {

		StringBuilder sb = new StringBuilder();
		sb.append(_PrimitiveName);
		sb.append(" [");
		
		if (this.integer != null) {
			sb.append("integer=");
			sb.append(integer);
		}
		if (this.number != null) {
			sb.append(" number=");
			sb.append(number.toString());
		}
		if (this.time != null) {
			sb.append(" time=");
			sb.append(time.toString());
		}
		if (this.date != null) {
			sb.append(" date=");
			sb.append(date.toString());
		}
		if (this.price != null) {
			sb.append(" price=");
			sb.append(price.toString());
		}

		sb.append("]");

		return sb.toString();
	}
}

